What are the levels in dig dug

Well, I don't know. I never got past level 9, but I do know that after every 4 levels you pass, the surroundings will change and I will show you how to play Dig Dug. 1) On level one, you will automatically be transported to the start of the game. Rush past the pookas and dragons by shotting at them or dropping a rock on them. 2) Dodge the dragons before you shot at them because they'll fire at you. 3) Do the same with the other levels until you pass the game!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!